A:
Positive:
1 x 2516155 x 503237 x 3594513 x 1935535 x 718949 x 513565 x 387179 x 318591 x 2765245 x 1027395 x 637455 x 553
Negative:
-1 x -251615-5 x -50323-7 x -35945-13 x -19355-35 x -7189-49 x -5135-65 x -3871-79 x -3185-91 x -2765-245 x -1027-395 x -637-455 x -553
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 251,615, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 251,615 | |
| -1 | -251,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 251,615.
Example:
1 x 251,615 = 251,615
and
-1 x -251,615 = 251,615
Notice both answers equal 251,615
With that explanation out of the way, let's continue. Next, we take the number 251,615 and divide it by 2:
251,615 ÷ 2 = 125,807.5
If the quotient is a whole number, then 2 and 125,807.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 251,615 | |
| -1 | -251,615 |
Now, we try dividing 251,615 by 3:
251,615 ÷ 3 = 83,871.6667
If the quotient is a whole number, then 3 and 83,871.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 251,615 | |
| -1 | -251,615 |
Let's try dividing by 4:
251,615 ÷ 4 = 62,903.75
If the quotient is a whole number, then 4 and 62,903.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 251,615 | |
| -1 | 251,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 79 | 91 | 245 | 395 | 455 | 553 | 637 | 1,027 | 2,765 | 3,185 | 3,871 | 5,135 | 7,189 | 19,355 | 35,945 | 50,323 | 251,615 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -79 | -91 | -245 | -395 | -455 | -553 | -637 | -1,027 | -2,765 | -3,185 | -3,871 | -5,135 | -7,189 | -19,355 | -35,945 | -50,323 | -251,615 |
Here are some more numbers to try:
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